On Tue, May 7, 2013 at 3:22 PM, Michael S. Tsirkin wrote:
> But why isn't iommu=pt effective?
> AFAIK the whole point of it was to give up on security
> for host-controlled devices, but still get a
> measure of security for assigned devices.
Good questions, from the tests Yan did so far he didn'
On 07/05/2013 01:35, Alexander Duyck wrote:
The Tx path ends up taking a performance hit if IOMMU is enabled. It
just isn't as severe due to things like TSO.
In testing done by some Mellanox folks I think they see major penalty on
the RX side, but hardly
nothing on the TX side, I'll check th
On Mon, May 06, 2013 at 03:35:58PM -0700, Alexander Duyck wrote:
> On 05/06/2013 02:39 PM, Or Gerlitz wrote:
> > On Thu, May 2, 2013 at 4:56 AM, Michael S. Tsirkin wrote:
> >> On Thu, May 02, 2013 at 02:11:15AM +0300, Or Gerlitz wrote:
> >>> So we've noted that when configuring the kernel && booti
On 05/06/2013 02:39 PM, Or Gerlitz wrote:
> On Thu, May 2, 2013 at 4:56 AM, Michael S. Tsirkin wrote:
>> On Thu, May 02, 2013 at 02:11:15AM +0300, Or Gerlitz wrote:
>>> So we've noted that when configuring the kernel && booting with intel
>>> iommu set to on on a physical node (non VM, and without
On Thu, May 2, 2013 at 4:56 AM, Michael S. Tsirkin wrote:
>
> On Thu, May 02, 2013 at 02:11:15AM +0300, Or Gerlitz wrote:
> > So we've noted that when configuring the kernel && booting with intel
> > iommu set to on on a physical node (non VM, and without enabling SRIOV
> > by the HW device driver
t;> To: Or Gerlitz
> >> Cc: Roland Dreier; io...@lists.linux-foundation.org; Yan Burman;
> >> linux- r...@vger.kernel.org
> >> Subject: Re: decent performance drop for SCSI LLD / SAN initiator
> >> when iommu is turned on
> >>
> >> On Thu, Ma
drop for SCSI LLD / SAN initiator when
iommu is turned on
On Thu, May 02, 2013 at 02:11:15AM +0300, Or Gerlitz wrote:
Hi Roland, IOMMU folks,
So we've noted that when configuring the kernel&& booting with intel
iommu set to on on a physical node (non VM, and without enabling SR
> -Original Message-
> From: Michael S. Tsirkin [mailto:m...@redhat.com]
> Sent: Thursday, May 02, 2013 04:56
> To: Or Gerlitz
> Cc: Roland Dreier; io...@lists.linux-foundation.org; Yan Burman; linux-
> r...@vger.kernel.org
> Subject: Re: decent performance dr
On Thu, May 02, 2013 at 02:11:15AM +0300, Or Gerlitz wrote:
> Hi Roland, IOMMU folks,
>
> So we've noted that when configuring the kernel && booting with intel
> iommu set to on on a physical node (non VM, and without enabling SRIOV
> by the HW device driver) raw performance of the iSER (iSCSI RDM
On Wed, May 1, 2013 at 4:11 PM, Or Gerlitz wrote:
> This was done over kernel 3.5.x, I will re-run tomorrow with latest
> upstream and send the top perf hits for both cases, but does this
> rings some bells? basically it makes sense for some extra latency, but
> I didn't expect the IOPS and BW dro
10 matches
Mail list logo
